20
14 19 20 16 11 13 12 18 17 15 
18 19 14 12 20 16 17 13 15 11 
14 17 15 12 20 11 18 16 19 13 
20 19 13 11 12 17 15 18 16 14 
14 13 17 18 15 11 19 12 20 16 
15 20 19 18 13 12 16 17 14 11 
16 19 14 12 18 11 17 15 13 20 
17 13 20 15 18 16 12 19 14 11 
19 18 16 13 17 14 20 11 15 12 
15 16 18 19 20 11 12 13 17 14 
4 1 9 7 5 2 6 8 3 10 
4 3 1 5 6 9 10 2 8 7 
9 2 6 5 8 4 1 10 7 3 
3 2 1 7 9 6 5 8 10 4 
1 8 6 4 5 3 10 2 7 9 
3 2 8 9 6 4 5 10 1 7 
1 2 9 5 10 7 4 3 8 6 
2 1 7 6 4 5 10 3 9 8 
6 5 3 4 1 10 2 7 8 9 
8 5 1 9 3 10 4 6 2 7 
forbidden 1 11
forbidden 1 12
forbidden 1 16
forbidden 2 15
forbidden 2 16
forbidden 2 18
forbidden 2 20
forbidden 3 11
forbidden 3 12
forbidden 3 16
forbidden 3 17
forbidden 4 12
forbidden 4 16
forbidden 4 19
forbidden 5 13
forbidden 5 15
forbidden 5 18
forbidden 5 20
forbidden 6 12
forbidden 6 17
forbidden 6 18
forbidden 7 11
forbidden 7 16
forbidden 8 13
forbidden 8 16
forbidden 8 17
forbidden 9 11
forbidden 9 16
forbidden 9 18
forbidden 9 19
forbidden 9 20
forbidden 10 13